10
CONFIGURING THE CP4 (ON/OFF TYPE)
PURGE OPTION
You are now prompted to select whether a purge is required.
Selecting N here enables you to bypass the next two displays.
Pre-purge activates relay 3 for the amount of time specified before
the heat relay is activated.
Post-purge will activate relay 3 for the amount of time
Specified after the heat relay has been switched off.
DOUBLE IGNITION
Enabling this option gives the following functionality.
When the heat relay is activated for the first time of each switching time, it will switch off after 30 seconds. Then
after a further 10 seconds the relay is re-energised and will operate as normal.
This operates at the start of every switching period and is used to ensure
that the heater fires when installed in areas where there is a high level
of condensation.
If post purge is enabled, the fan will timeout before the heater re-fires.
PROVING SWITCH
You are now prompted to select whether you have a proving switch
on the system.
When there is a demand for heat, the Benson CP4 looks to check firstly that the proving switch is not made.
Relay 3 is then energised giving pre purge if required. The proving switch then makes followed by relay 2 being
energised.
When you have completed the configuration procedure you will be returned to the setup menu screen. At this
point you can press RUN to return to the Normal RUN mode or you can continue to program the other settings
by selecting another menu option.
PURGE REQUIRED?
N<0> Y<1> : 1
PREPURGE TIME
<MINS> :00
POSTPURGE TIME
<MINS> :00
DOUBLE IGNITION ?
N<0> Y<1> : 0
PROVING SWITCH?
N<0> Y<1> :0
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